public static bool TryFormat(this long value, Span <byte> buffer, Format.Parsed format, FormattingData formattingData, out int bytesWritten)
{
return(IntegerFormatter.TryFormatInt64(value, 8, buffer, format, formattingData, out bytesWritten));
}
public static bool TryFormat(this Guid value, Span<byte> buffer, Format.Parsed format, FormattingData formattingData, out int bytesWritten)
{
if (format.IsDefault)
{
format.Symbol = 'G';
}
Precondition.Require(format.Symbol == 'G' || format.Symbol == 'D' || format.Symbol == 'N' || format.Symbol == 'B' || format.Symbol == 'P');
bool dash = true;
char tail = '\0';
bytesWritten = 0;
switch (format.Symbol)
{
case 'D':
case 'G':
break;
case 'N':
dash = false;
break;
case 'B':
if (!TryWriteChar('{', buffer, formattingData, ref bytesWritten)) { return false; }
tail = '}';
break;
case 'P':
if (!TryWriteChar('(', buffer, formattingData, ref bytesWritten)) { return false; }
tail = ')';
break;
default:
Precondition.Require(false); // how did we get here?
break;
}
var byteFormat = new Format.Parsed('x', 2);
unsafe
{
byte* bytes = (byte*)&value;
if (!TryWriteByte(bytes[3], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[2], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[1], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[0], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (dash)
{
if (!TryWriteChar('-', buffer, formattingData, ref bytesWritten)) { return false; }
}
if (!TryWriteByte(bytes[5], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[4], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (dash)
{
if (!TryWriteChar('-', buffer, formattingData, ref bytesWritten)) { return false; }
}
if (!TryWriteByte(bytes[7], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[6], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (dash)
{
if (!TryWriteChar('-', buffer, formattingData, ref bytesWritten)) { return false; }
}
if (!TryWriteByte(bytes[8], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[9], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (dash)
{
if (!TryWriteChar('-', buffer, formattingData, ref bytesWritten)) { return false; }
}
if (!TryWriteByte(bytes[10], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[11], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[12], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[13], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[14], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
if (!TryWriteByte(bytes[15], buffer, byteFormat, formattingData, ref bytesWritten)) { return false; }
}
if (tail != '\0')
{
if (!TryWriteChar(tail, buffer, formattingData, ref bytesWritten)) { return false; }
}
return true;
}
public static bool TryFormat(this string value, Span <byte> buffer, Format.Parsed format, FormattingData formattingData, out int bytesWritten)
{
var byteSpan = buffer.BorrowDisposableByteSpan();
try
{
var avaliableBytes = byteSpan.Length;
if (formattingData.IsUtf16)
{
var neededBytes = value.Length << 1;
if (neededBytes > avaliableBytes)
{
bytesWritten = 0;
return(false);
}
unsafe
{
fixed(char *pCharacters = value)
{
byte *pBytes = (byte *)pCharacters;
byteSpan.Set(pBytes, neededBytes);
}
}
bytesWritten = neededBytes;
return(true);
}
bytesWritten = 0;
for (int i = 0; i < value.Length; i++)
{
var c = value[i];
var codepoint = (ushort)c;
if (codepoint <= 0x7f) // this if block just optimizes for ascii
{
if (bytesWritten + 1 > avaliableBytes)
{
bytesWritten = 0;
return(false);
}
byteSpan[bytesWritten++] = (byte)codepoint;
}
else
{
var encoded = new Utf8Helpers.FourBytes();
var bytes = Utf8Helpers.CharToUtf8(c, ref encoded);
if (bytesWritten + bytes > avaliableBytes)
{
bytesWritten = 0;
return(false);
}
byteSpan[bytesWritten] = encoded.B0;
if (bytes > 1)
{
byteSpan[+bytesWritten + 1] = encoded.B1;
if (bytes > 2)
{
byteSpan[+bytesWritten + 2] = encoded.B2;
if (bytes > 3)
{
byteSpan[+bytesWritten + 3] = encoded.B3;
}
}
}
bytesWritten += bytes;
}
}
return(true);
}
finally
{
byteSpan.Free();
}
}
public static bool TryFormat(this DateTime value, Span <byte> buffer, ReadOnlySpan <char> format, FormattingData formattingData, out int bytesWritten)
{
Format.Parsed parsedFormat = Format.Parse(format);
return(TryFormat(value, buffer, parsedFormat, formattingData, out bytesWritten));
}
private static bool TryFormatTimeSpanG(TimeSpan value, Span <byte> buffer, Format.Parsed format, FormattingData formattingData, out int bytesWritten)
{
bytesWritten = 0;
if (value.Ticks < 0)
{
if (!TryWriteChar('-', buffer, formattingData, ref bytesWritten))
{
return(false);
}
}
bool daysWritten = false;
if (value.Days != 0 || format.Symbol == 'G')
{
if (!TryWriteInt32(Abs(value.Days), buffer, default(Format.Parsed), formattingData, ref bytesWritten))
{
return(false);
}
daysWritten = true;
if (format.Symbol == 'c')
{
if (!TryWriteChar('.', buffer, formattingData, ref bytesWritten))
{
return(false);
}
}
else
{
if (!TryWriteChar(':', buffer, formattingData, ref bytesWritten))
{
return(false);
}
}
}
var hourFormat = default(Format.Parsed);
if ((daysWritten || format.Symbol == 'c') && format.Symbol != 'g')
{
hourFormat = D2;
}
if (!TryWriteInt32(Abs(value.Hours), buffer, hourFormat, formattingData, ref bytesWritten))
{
return(false);
}
if (!TryWriteChar(':', buffer, formattingData, ref bytesWritten))
{
return(false);
}
if (!TryWriteInt32(Abs(value.Minutes), buffer, D2, formattingData, ref bytesWritten))
{
return(false);
}
if (!TryWriteChar(':', buffer, formattingData, ref bytesWritten))
{
return(false);
}
if (!TryWriteInt32(Abs(value.Seconds), buffer, D2, formattingData, ref bytesWritten))
{
return(false);
}
long remainingTicks;
if (value.Ticks != long.MinValue)
{
remainingTicks = Abs(value.Ticks) % TimeSpan.TicksPerSecond;
}
else
{
remainingTicks = long.MaxValue % TimeSpan.TicksPerSecond;
remainingTicks = (remainingTicks + 1) % TimeSpan.TicksPerSecond;
}
var ticksFormat = D7;
if (remainingTicks != 0)
{
if (!TryWriteChar('.', buffer, formattingData, ref bytesWritten))
{
return(false);
}
var fraction = remainingTicks * FractionalTimeScale / TimeSpan.TicksPerSecond;
if (!TryWriteInt64(fraction, buffer, ticksFormat, formattingData, ref bytesWritten))
{
return(false);
}
}
return(true);
}
public static bool TryFormat(this string value, Span <byte> buffer, Format.Parsed format, FormattingData formattingData, out int bytesWritten)
{
if (formattingData.IsUtf16)
{
var valueBytes = value.Length << 1;
if (valueBytes > buffer.Length)
{
bytesWritten = 0;
return(false);
}
unsafe
{
fixed(char *pCharacters = value)
{
byte *pBytes = (byte *)pCharacters;
buffer.Set(pBytes, valueBytes);
}
}
bytesWritten = valueBytes;
return(true);
}
var avaliableBytes = buffer.Length;
bytesWritten = 0;
for (int i = 0; i < value.Length; i++)
{
var c = value[i];
var codepoint = (ushort)c;
if (codepoint <= 0x7f) // this if block just optimizes for ascii
{
if (bytesWritten + 1 > avaliableBytes)
{
bytesWritten = 0;
return(false);
}
buffer[bytesWritten++] = (byte)codepoint;
}
else
{
Utf8EncodedCodePoint encoded;
if (!char.IsSurrogate(c))
{
encoded = new Utf8EncodedCodePoint(c);
}
else
{
if (++i >= value.Length)
{
throw new ArgumentException("Invalid surrogate pair.", nameof(value));
}
char lowSurrogate = value[i];
encoded = new Utf8EncodedCodePoint(c, lowSurrogate);
}
if (bytesWritten + encoded.Length > avaliableBytes)
{
bytesWritten = 0;
return(false);
}
buffer[bytesWritten] = encoded.Byte0;
if (encoded.Length > 1)
{
buffer[bytesWritten + 1] = encoded.Byte1;
if (encoded.Length > 2)
{
buffer[bytesWritten + 2] = encoded.Byte2;
if (encoded.Length > 3)
{
buffer[bytesWritten + 3] = encoded.Byte3;
}
}
}
bytesWritten += encoded.Length;
}
}
return(true);
}
static void AppendUntyped <TFormatter, T>(this TFormatter formatter, T value, Format.Parsed format) where TFormatter : IFormatter
{
#region Built in types
var i32 = value as int?;
if (i32 != null)
{
formatter.Append(i32.Value, format);
return;
}
var i64 = value as long?;
if (i64 != null)
{
formatter.Append(i64.Value, format);
return;
}
var i16 = value as short?;
if (i16 != null)
{
formatter.Append(i16.Value, format);
return;
}
var b = value as byte?;
if (b != null)
{
formatter.Append(b.Value, format);
return;
}
var c = value as char?;
if (c != null)
{
formatter.Append(c.Value, format);
return;
}
var u32 = value as uint?;
if (u32 != null)
{
formatter.Append(u32.Value, format);
return;
}
var u64 = value as ulong?;
if (u64 != null)
{
formatter.Append(u64.Value, format);
return;
}
var u16 = value as ushort?;
if (u16 != null)
{
formatter.Append(u16.Value, format);
return;
}
var sb = value as sbyte?;
if (sb != null)
{
formatter.Append(sb.Value, format);
return;
}
var str = value as string;
if (str != null)
{
formatter.Append(str, format);
return;
}
var dt = value as DateTime?;
if (dt != null)
{
formatter.Append(dt.Value, format);
return;
}
var ts = value as TimeSpan?;
if (ts != null)
{
formatter.Append(ts.Value, format);
return;
}
#endregion
if (value is IBufferFormattable)
{
formatter.Append((IBufferFormattable)value, format); // this is boxing. not sure how to avoid it.
return;
}
throw new NotSupportedException("value is not formattable.");
}
